ONiON

ONiON is a 3★ character in Reverse: 1999.

ONiON was released on October 26, 2023. They were introduced alongside An-an Lee, AliEn T, Зима, APPLe, Druvis III, Bunny Bunny, La Source, Regulus, Satsuki, Balloon Party, Bette, Bkornblume, Lilya, Centurion, Matilda, Medicine Pocket, Mesmer Jr., A Knight, TTT, Nick Bottom, Ms. Radio, Pavia, Sotheby, Poltergeist, Sputnik, Sweetheart, Rabies, Tennant, Dikke, Darley Clatter, Cristallo, Click, Oliver Fog, Eagle, Erick, Eternity, Ms. NewBabel, Baby Blue, Sonetto, Necrologist, Mondlicht, Leilani, The Fool, Twins Sleep, Voyager, Charlie, X, Ms. Moissan, Door, John Titor, suggesting they were part of the same content update.